ITS/AliITSTrackerV1.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /*
  17 $Log$
  18 Revision 1.25  2002/10/24 17:12:58  barbera
  19 ITS tracking V1 integrated with the last version of ITS PID
  20
  21 Revision 1.24  2002/10/23 14:28:38  barbera
  22 Fixes added to get into account the new magnetic field conversion factor automatically
  23
  24 Revision 1.23  2002/10/22 18:29:34  barbera
  25 Tracking V1 ported to the HEAD
  26
  27 Revision 1.22  2002/10/22 14:45:36  alibrary
  28 Introducing Riostream.h
  29
  30 Revision 1.21  2002/02/05 09:12:26  hristov
  31 Small mods for gcc 3.02
  32
  33 Revision 1.20  2001/11/21 14:47:45  barbera
  34 Some unuseful print-out commented out
  35
  36 Revision 1.19  2001/11/21 10:49:07  barbera
  37 Bug correction suggested by Rene done
  38
  39 Revision 1.18  2001/11/20 15:46:17  barbera
  40 Point coordinated are calculated in cylindrical reference frame once and for all at the beginning of tracking V1
  41
  42 Revision 1.10.2.1  2001/10/24 07:26:04  hristov
  43 All the changes from the head are merged with the release
  44
  45 Revision 1.14  2001/10/24 07:19:57  hristov
  46 Some pointer correctly initialised in one of the constructors
  47
  48 Revision 1.13  2001/10/21 19:17:12  hristov
  49 Several pointers were set to zero in the default constructors to avoid memory management problems
  50
  51 Revision 1.12  2001/10/19 21:32:35  nilsen
  52 Minor changes to remove compliation warning on gcc 2.92.2 compiler, and
  53 cleanded up a little bit of code.
  54
  55 */
  56 // The purpose of this class is to permorm the ITS tracking. The
  57 // constructor has the task to inizialize some private members. The method
  58 // DoTracking is written to be called by a macro. It gets the event number,
  59 // the minimum and maximum order number of TPC tracks that are to be tracked
  60 // trough the ITS, and the file where the recpoints are registered. The
  61 // method Recursivetracking is a recursive function that performs the
  62 // tracking trough the ITS The method Intersection found the layer, ladder
  63 // and detector whre the intersection take place and caluclate the
  64 // cohordinates of this intersection. It returns an integer that is 0 if the
  65 // intersection has been found successfully. The two mwthods Kalmanfilter
  66 // and kalmanfiltervert operate the kalmanfilter without and with the vertex
  67 // imposition respectively. The authors thank Mariana Bondila to have help
  68 // them to resolve some problems.  July-2000
  69
  70 #include <Riostream.h>
  71 #include <Riostream.h>
  72 #include <TMath.h>
  73 #include <TBranch.h>
  74 #include <TVector.h>
  75 #include <TFile.h>
  76 #include <TTree.h>
  77 #include <TStopwatch.h>
  78
  79 #include "TParticle.h"
  80 #include "AliRun.h"
  81 #include "AliITS.h"
  82 #include "AliITSsegmentationSSD.h"
  83 #include "AliITSgeomSPD.h"
  84 #include "AliITSgeomSDD.h"
  85 #include "AliITSgeomSSD.h"
  86 #include "AliITSgeom.h"
  87 #include "AliITSRecPoint.h"
  88 #include "stdlib.h"
  89 #include "AliKalmanTrack.h"
  90 #include "AliMagF.h"
  91 #include "AliITSTrackV1.h"
  92 #include "AliITSIOTrack.h"
  93 #include "AliITSRad.h"
  94 #include "../TPC/AliTPCtracker.h"
  95 #include "AliITSTrackerV1.h"
  96 #include "AliITSVertex.h"
  97 #include "AliITSPid.h"
  98
  99 ClassImp(AliITSTrackerV1)
 100  //______________________________________________________________________
 101 AliITSTrackerV1::AliITSTrackerV1() {
 102   //Default constructor
 103   fITS = 0;
 104   fresult = 0;
 105   fPtref=0.;
 106   fChi2max=0.;
 107   //fepsphi=0.;
 108   //fepsz=0.;
 109   frecPoints = 0;
 110   fvettid = 0;
 111   fflagvert=0;
 112   frl = 0;
 113   Int_t ia;
 114   for(ia=0; ia<6; ia++) {
 115   fNlad[ia]=0;
 116   fNdet[ia]=0;
 117   fAvrad[ia]=0.;
 118   fDetx[ia]=0.;
 119   fDetz[ia]=0.;
 120   } // end for ia
 121   fzmin = 0;
 122   fzmax = 0;
 123   fphimin = 0;
 124   fphimax = 0;
 125   fphidet = 0;
 126   fNRecPoints=0;
 127   fRecCylR=0;
 128   fRecCylPhi=0;
 129   fRecCylZ=0;
 130   fFieldFactor=0;
 131 }
 132 //______________________________________________________________________
 133 AliITSTrackerV1::AliITSTrackerV1(AliITS* IITTSS, Int_t evnumber, Bool_t flag) {
 134     //Origin   A. Badala' and G.S. Pappalardo:
 135     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 136     // Class constructor. It does some initializations.
 137
 138   //PH Initialisation taken from the default constructor
 139     fITS      = IITTSS;
 140     fresult = 0;
 141     fPtref    = 0.;
 142     fChi2max  =0.;
 143     frecPoints = 0;
 144     fvettid = 0;
 145     fflagvert = flag;
 146     frl = 0;
 147     fzmin = 0;
 148     fzmax = 0;
 149     fphimin = 0;
 150     fphimax = 0;
 151     fphidet = 0;
 152
 153     Int_t imax = 200,jmax = 450;
 154     frl       = new AliITSRad(imax,jmax);
 155
 156     //////////  gets information on geometry /////////////////////////////
 157          AliITSgeom *g1 = fITS->GetITSgeom();
 158     Int_t ll=1, dd=1;
 159     TVector det(9);
 160
 161     Int_t ia;
 162     for(ia=0; ia<6; ia++) {
 163         fNlad[ia]=g1->GetNladders(ia+1);
 164         fNdet[ia]=g1->GetNdetectors(ia+1);
 165         //cout<<fNlad[i]<<" "<<fNdet[i]<<"\n";
 166     } // end for ia
 167
 168     //cout<<" mean radius = ";
 169     Int_t ib;
 170     for(ib=0; ib<6; ib++) {
 171         g1->GetCenterThetaPhi(ib+1,ll,dd,det);
 172         Double_t r1=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 173         g1->GetCenterThetaPhi(ib+1,ll,dd+1,det);
 174         Double_t r2=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 175         fAvrad[ib]=(r1+r2)/2.;
 176         //cout<<fAvrad[ib]<<" ";
 177     } // end for ib
 178     //cout<<"\n"; getchar();
 179
 180     fDetx[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDx();
 181     fDetz[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDz();
 182
 183     fDetx[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDx();
 184     fDetz[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDz();
 185
 186     fDetx[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDx();
 187     fDetz[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDz();
 188
 189     fDetx[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDx();
 190     fDetz[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDz();
 191
 192     fDetx[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDx();
 193     fDetz[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDz();
 194
 195     fDetx[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDx();
 196     fDetz[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDz();
 197     //cout<<"    Detx     Detz\n";
 198     //for(Int_t la=0; la<6; la++) cout<<"    "<<fDetx[la]<<"     "<<
 199     //                                 fDetz[la]<<endl;
 200     //getchar();
 201
 202     // allocate memory and define matrices fzmin, fzmax, fphimin and fphimax //
 203     Double_t epsz=1.2;
 204     Double_t epszdrift=0.05;
 205
 206     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 207     Int_t im1, im2, im2max;
 208     for(im1=0; im1<6; im1++) {
 209         im2max=fNdet[im1];
 210         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 211     } // end for im1
 212
 213     for(im1=0; im1<6; im1++) {
 214         im2max=fNdet[im1];
 215         for(im2=0; im2<im2max; im2++) {
 216             g1->GetCenterThetaPhi(im1+1,1,im2+1,det);
 217             if(im2!=0) fzmin[im1][im2]=det(2)-fDetz[im1];
 218             else
 219                 fzmin[im1][im2]=det(2)-(fDetz[im1])*epsz;
 220             if(im2!=(im2max-1)) fzmax[im1][im2]=det(2)+fDetz[im1];
 221             else
 222                 fzmax[im1][im2]=det(2)+fDetz[im1]*epsz;
 223             if(im1==2 || im1==3) {
 224                 fzmin[im1][im2]-=epszdrift;
 225                 fzmax[im1][im2]+=epszdrift;
 226             } // end if im1==2 || im1==3
 227         } // end for im2
 228     } // end for im1
 229
 230     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 231     for(im1=0;im1<6;im1++) {
 232         im2max=fNlad[im1];
 233         fphimin[im1] = new Double_t[im2max];
 234         fphimax[im1] = new Double_t[im2max];
 235     } // end for im1
 236
 237     fphidet = new Double_t*[6];
 238     for(im1=0; im1<6; im1++) {
 239         im2max=fNlad[im1];
 240         fphidet[im1] = new Double_t[im2max];
 241     } // end for im1
 242
 243         Double_t global[3],local[3];
 244     Double_t pigre=TMath::Pi();
 245     Double_t xmin,ymin,xmax,ymax;
 246
 247     for(im1=0; im1<6; im1++) {
 248         im2max=fNlad[im1];
 249         for(im2=0; im2<im2max; im2++) {
 250             Int_t idet=2;
 251             g1->GetCenterThetaPhi(im1+1,im2+1,idet,det);
 252             fphidet[im1][im2] = TMath::ATan2(Double_t(det(1)),
 253                                              Double_t(det(0)));
 254             if(fphidet[im1][im2]<0.) fphidet[im1][im2]+=2.*pigre;
 255             local[1]=local[2]=0.;
 256             local[0]= -(fDetx[im1]);
 257             if(im1==0) local[0]= (fDetx[im1]); //to take into account
 258                                                // different reference system
 259             g1->LtoG(im1+1,im2+1,idet,local,global);
 260             xmax=global[0]; ymax=global[1];
 261             local[0]= (fDetx[im1]);
 262             if(im1==0) local[0]= -(fDetx[im1]);//take into account different
 263                                                // reference system
 264             g1->LtoG(im1+1,im2+1,idet,local,global);
 265             xmin=global[0]; ymin=global[1];
 266             fphimin[im1][im2]= TMath::ATan2(ymin,xmin);
 267             if(fphimin[im1][im2]<0.) fphimin[im1][im2]+=2.*pigre;
 268             fphimax[im1][im2]= TMath::ATan2(ymax,xmax);
 269             if(fphimax[im1][im2]<0.) fphimax[im1][im2]+=2.*pigre;
 270         } // end for im2
 271     } // end for im1
 272 //////////////////////////////////////////////////////////////////////////////////////////////////////////
 273 /////////////// allocate memory and define vector fNRecPoints and matrices fRecCylR, fRecCylPhi, fRecCylZ /////////////
 274         gAlice->GetEvent(evnumber);
 275   Int_t NumOfModules = g1->GetIndexMax();
 276   fRecCylR = new Double_t *[NumOfModules];
 277   fRecCylPhi = new Double_t *[NumOfModules];
 278   fRecCylZ = new Double_t *[NumOfModules];
 279   AliITSRecPoint *recp;
 280   fNRecPoints = new Int_t[NumOfModules];
 281
 282                  for(Int_t module=0; module<NumOfModules; module++) {
 283                   fITS->ResetRecPoints();
 284         gAlice->TreeR()->GetEvent(module);
 285                   frecPoints=fITS->RecPoints();
 286                   Int_t nRecPoints=fNRecPoints[module]=frecPoints->GetEntries();
 287                   fRecCylR[module] = new Double_t[nRecPoints];
 288                   fRecCylPhi[module] = new Double_t[nRecPoints];
 289                   fRecCylZ[module] = new  Double_t[nRecPoints];
 290                   Int_t ind;
 291                   for(ind=0; ind<fNRecPoints[module]; ind++) {
 292                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(ind);
 293                         // Float_t global[3], local[3];
 294                          Double_t global[3], local[3];
 295                local[0]=recp->GetX();
 296                local[1]=0.;
 297                local[2]= recp->GetZ();
 298                          g1->LtoG(module,local,global);
 299
 300                          Double_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]);                     // r hit
 301                          Double_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi();      // phi hit
 302                  Double_t z = global[2];                                                                // z hit
 303
 304                          fRecCylR[module][ind]=r;
 305                          fRecCylPhi[module][ind]=phi;
 306                          fRecCylZ[module][ind]=z;
 307                   }
 308                 }
 309          //}
 310   //}
 311 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 312
 313
 314     ////////// gets magnetic field factor //////////////////////////////
 315
 316     AliMagF * fieldPointer = gAlice->Field();
 317    // fFieldFactor = (Double_t)fieldPointer->Factor();
 318     fFieldFactor =(Double_t)fieldPointer-> SolenoidField()/10/.2;
 319    // cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
 320 }
 321 //______________________________________________________________________
 322 AliITSTrackerV1::AliITSTrackerV1(const AliITSTrackerV1 &cobj) {
 323     // Origin  A. Badala' and G.S. Pappalardo:
 324     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 325     // copy constructor
 326
 327          *fITS = *cobj.fITS;
 328     *fresult = *cobj.fresult;
 329     fPtref = cobj.fPtref;
 330     fChi2max = cobj.fChi2max;
 331     **fvettid = **cobj.fvettid;
 332     fflagvert = cobj.fflagvert;
 333     Int_t imax=200,jmax=450;
 334     frl = new AliITSRad(imax,jmax);
 335     *frl = *cobj.frl;
 336     fFieldFactor = cobj.fFieldFactor;
 337     Int_t i,im1,im2,im2max;
 338     for(i=0; i<6; i++) {
 339         fNlad[i] = cobj.fNlad[i];
 340         fNdet[i] = cobj.fNdet[i];
 341         fAvrad[i] = cobj.fAvrad[i];
 342         fDetx[i] = cobj.fDetx[i];
 343         fDetz[i] = cobj.fDetz[i];
 344     } // end or i
 345     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 346     for(im1=0; im1<6; im1++) {
 347         im2max=fNdet[im1];
 348         fzmin[im1] = new Double_t[im2max];
 349         fzmax[im1] = new Double_t[im2max];
 350     } // end for im1
 351     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 352     for(im1=0;im1<6;im1++) {
 353         im2max=fNlad[im1];
 354         fphimin[im1] = new Double_t[im2max];
 355         fphimax[im1] = new Double_t[im2max];
 356     } // end for im1
 357
 358     fphidet = new Double_t*[6];
 359     for(im1=0; im1<6; im1++) {
 360         im2max=fNlad[im1];
 361         fphidet[im1] = new Double_t[im2max];
 362     } // end for im1
 363     for(im1=0; im1<6; im1++) {
 364         im2max=fNdet[im1];
 365         for(im2=0; im2<im2max; im2++) {
 366             fzmin[im1][im2]=cobj.fzmin[im1][im2];
 367             fzmax[im1][im2]=cobj.fzmax[im1][im2];
 368         } // end for im2
 369     } // end for im1
 370     for(im1=0; im1<6; im1++) {
 371         im2max=fNlad[im1];
 372         for(im2=0; im2<im2max; im2++) {
 373             fphimin[im1][im2]=cobj.fphimin[im1][im2];
 374             fphimax[im1][im2]=cobj.fphimax[im1][im2];
 375             fphidet[im1][im2]=cobj.fphidet[im1][im2];
 376         } // end for im2
 377     } // end for im2
 378
 379
 380         AliITSgeom *g1 = fITS->GetITSgeom();
 381    Int_t NumOfModules = g1->GetIndexMax();
 382         /*
 383   fRecCylR = new Float_t *[NumOfModules];
 384   fRecCylPhi = new Float_t *[NumOfModules];
 385   fRecCylZ = new Float_t *[NumOfModules];
 386   */
 387   fRecCylR = new Double_t *[NumOfModules];
 388   fRecCylPhi = new Double_t *[NumOfModules];
 389   fRecCylZ = new Double_t *[NumOfModules];
 390   fNRecPoints = new Int_t[NumOfModules];
 391                 for(Int_t module=0; module<NumOfModules; module++) {
 392                   Int_t nRecPoints=fNRecPoints[module]=cobj.fNRecPoints[module];
 393                   /*
 394                   fRecCylR[module] = new Float_t[nRecPoints];
 395                   fRecCylPhi[module] = new Float_t[nRecPoints];
 396                   fRecCylZ[module] = new Float_t[nRecPoints];
 397                   */
 398                   fRecCylR[module] = new Double_t[nRecPoints];
 399                   fRecCylPhi[module] = new Double_t[nRecPoints];
 400                   fRecCylZ[module] = new Double_t[nRecPoints];
 401                   Int_t ind;
 402                   for(ind=0; ind<nRecPoints; ind++) {
 403                          fRecCylR[module][ind]=cobj.fRecCylR[module][ind];
 404                          fRecCylPhi[module][ind]=cobj.fRecCylPhi[module][ind];
 405                          fRecCylZ[module][ind]=cobj.fRecCylZ[module][ind];
 406                   }
 407                 }
 408
 409 }
 410 void AliITSTrackerV1::DelMatrix(Int_t NumOfModules) {
 411   for(Int_t mod=0; mod<NumOfModules; mod++) {
 412     delete fRecCylR[mod];
 413          delete fRecCylPhi[mod];
 414          delete fRecCylZ[mod];
 415   }
 416     delete fRecCylR;
 417          delete fRecCylPhi;
 418          delete fRecCylZ;
 419 }
 420 //______________________________________________________________________
 421 AliITSTrackerV1::~AliITSTrackerV1(){
 422     // Origin  A. Badala' and G.S. Pappalardo:
 423     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 424     // class destructor
 425   delete frl;
 426   delete fNRecPoints;
 427   for(Int_t i=0; i<6; i++) {
 428     delete fzmin[i];
 429          delete fzmax[i];
 430          delete fphimin[i];
 431          delete fphimax[i];
 432          delete fphidet[i];
 433   }
 434
 435   delete fzmin;
 436   delete fzmax;
 437   delete fphimin;
 438   delete fphimax;
 439   delete fphidet;
 440
 441 }
 442 //______________________________________________________________________
 443 AliITSTrackerV1 &AliITSTrackerV1::operator=(AliITSTrackerV1 obj) {
 444     // Origin  A. Badala' and G.S. Pappalardo:
 445     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 446     // assignement operator
 447
 448          *fITS = *obj.fITS;
 449     *fresult = *obj.fresult;
 450     fPtref = obj.fPtref;
 451     fChi2max = obj.fChi2max;
 452     **fvettid = **obj.fvettid;
 453     fflagvert = obj.fflagvert;
 454     Int_t imax=200,jmax=450;
 455     frl = new AliITSRad(imax,jmax);
 456     *frl = *obj.frl;
 457     fFieldFactor = obj.fFieldFactor;
 458     Int_t i;
 459     for(i=0; i<6; i++) {
 460         fNlad[i] = obj.fNlad[i];
 461         fNdet[i] = obj.fNdet[i];
 462         fAvrad[i] = obj.fAvrad[i];
 463         fDetx[i] = obj.fDetx[i];
 464         fDetz[i] = obj.fDetz[i];
 465     } // end for i
 466     fzmin = new Double_t*[6];
 467     fzmax = new Double_t*[6];
 468     Int_t im1, im2, im2max;
 469     for(im1=0; im1<6; im1++) {
 470         im2max=fNdet[im1];
 471         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 472     } // end for im1
 473     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 474     for(im1=0;im1<6;im1++) {
 475         im2max=fNlad[im1];
 476         fphimin[im1] = new Double_t[im2max];
 477         fphimax[im1] = new Double_t[im2max];
 478     } // end for im1
 479
 480     fphidet = new Double_t*[6];
 481     for(im1=0; im1<6; im1++) {
 482         im2max=fNlad[im1];
 483         fphidet[im1] = new Double_t[im2max];
 484     } // end for im1
 485     for(im1=0; im1<6; im1++) {
 486         im2max=fNdet[im1];
 487         for(im2=0; im2<im2max; im2++) {
 488             fzmin[im1][im2]=obj.fzmin[im1][im2];
 489             fzmax[im1][im2]=obj.fzmax[im1][im2];
 490         } // end for im2
 491     } // end for im1
 492     for(im1=0; im1<6; im1++) {
 493         im2max=fNlad[im1];
 494         for(im2=0; im2<im2max; im2++) {
 495             fphimin[im1][im2]=obj.fphimin[im1][im2];
 496             fphimax[im1][im2]=obj.fphimax[im1][im2];
 497             fphidet[im1][im2]=obj.fphidet[im1][im2];
 498         } // end for im2
 499     } // end for im1
 500
 501         AliITSgeom *g1 = fITS->GetITSgeom();
 502    Int_t NumOfModules = g1->GetIndexMax();
 503   fRecCylR = new Double_t *[NumOfModules];
 504   fRecCylPhi = new Double_t *[NumOfModules];
 505   fRecCylZ = new Double_t *[NumOfModules];
 506   fNRecPoints = new Int_t[NumOfModules];
 507           for(Int_t module=0; module<NumOfModules; module++) {
 508                   Int_t nRecPoints=fNRecPoints[module]=obj.fNRecPoints[module];
 509                   fRecCylR[module] = new Double_t[nRecPoints];
 510                   fRecCylPhi[module] = new Double_t[nRecPoints];
 511                   fRecCylZ[module] = new Double_t[nRecPoints];
 512                   Int_t ind;
 513                   for(ind=0; ind<nRecPoints; ind++) {
 514                          fRecCylR[module][ind]=obj.fRecCylR[module][ind];
 515                          fRecCylPhi[module][ind]=obj.fRecCylPhi[module][ind];
 516                          fRecCylZ[module][ind]=obj.fRecCylZ[module][ind];
 517                   }
 518                 }
 519
 520
 521     return *this;
 522 }
 523 //______________________________________________________________________
 524 void AliITSTrackerV1::DoTracking(Int_t evNumber,Int_t minTr,Int_t maxTr,
 525                                  TFile *file, Bool_t realmass) {
 526     // Origin   A. Badala' and G.S. Pappalardo:
 527     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 528     // The method needs the event number, the minimum and maximum order
 529     // number of TPC tracks that
 530     // are to be tracked trough the ITS, and the file where the recpoints
 531     // are registered.
 532     // The method can be called by a macro. It preforms the tracking for
 533     // all good TPC tracks
 534
 535     printf("begin DoTracking - file %p\n",file);
 536
 537     gAlice->GetEvent(evNumber);  //modificato per gestire hbt
 538
 539     AliKalmanTrack *kkprov;
 540     //kkprov->SetConvConst(100/0.299792458/0.2/fFieldFactor);
 541     kkprov->SetConvConst(1000/0.299792458/gAlice->Field()->SolenoidField());
 542    // cout<<" field = "<<gAlice->Field()->SolenoidField()<<endl;
 543
 544
 545     TFile *cf=TFile::Open("AliTPCclusters.root");
 546     AliTPCParam *digp= (AliTPCParam*)cf->Get("75x40_100x60_150x60");
 547     if (!digp) { cerr<<"TPC parameters have not been found !\n"; getchar();}
 548
 549     cf->cd();
 550     AliTPCtracker *tracker = new AliTPCtracker(digp,evNumber);
 551
 552     // Load clusters
 553     tracker->LoadInnerSectors();
 554     tracker->LoadOuterSectors();
 555
 556     // Load tracks
 557     TFile *tf=TFile::Open("AliTPCtracksSorted.root");
 558     if (!tf->IsOpen()) {
 559         cerr<<"Can't open AliTPCtracksSorted.root !\n";
 560         return ;
 561     } // end if
 562     TObjArray tracks(200000);
 563     char tname[100];
 564     sprintf(tname,"TreeT_TPC_%d",evNumber);
 565
 566     TTree *tracktree=(TTree*)tf->Get(tname);
 567     if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n";}
 568     TBranch *tbranch=tracktree->GetBranch("tracks");
 569     Int_t nentr=(Int_t)tracktree->GetEntries();
 570     Int_t kk;
 571
 572     AliITSRecPoint *recp;    // oggi
 573         AliTPCtrack *ioTrackTPC=0;
 574     for (kk=0; kk<nentr; kk++) {
 575         ioTrackTPC=new AliTPCtrack;
 576         tbranch->SetAddress(&ioTrackTPC);
 577         tracktree->GetEvent(kk);
 578         tracker->CookLabel(ioTrackTPC,0.1);
 579         tracks.AddLast(ioTrackTPC);
 580     } // end for kk
 581     delete tracker;
 582     tf->Close();
 583
 584     Int_t nt = tracks.GetEntriesFast();
 585     cerr<<"Number of found tracks "<<nt<<endl;
 586
 587     TVector vec(5);
 588     TTree *tr=gAlice->TreeR();
 589     Int_t nent=(Int_t)tr->GetEntries();
 590     frecPoints = fITS->RecPoints();
 591
 592     Int_t numbpoints;
 593     Int_t totalpoints=0;
 594     Int_t *np = new Int_t[nent];
 595     fvettid = new Int_t* [nent];
 596     Int_t mod;
 597
 598     for (mod=0; mod<nent; mod++) {
 599         fvettid[mod]=0;
 600         fITS->ResetRecPoints();
 601         gAlice->TreeR()->GetEvent(mod);
 602         numbpoints = frecPoints->GetEntries();
 603         totalpoints+=numbpoints;
 604         np[mod] = numbpoints;
 605         //cout<<" mod = "<<mod<<"   numbpoints = "<<numbpoints<<"\n";getchar();
 606         fvettid[mod] = new Int_t[numbpoints];
 607         Int_t ii;
 608         for (ii=0;ii<numbpoints; ii++) *(fvettid[mod]+ii)=0;
 609     } // end for mod
 610
 611     AliTPCtrack *track=0;
 612
 613     if(minTr < 0) {minTr = 0; maxTr = nt-1;}
 614
 615     TVector vgeant(3);
 616
 617     TTree tracktree1("TreeT","Tree with ITS tracks");
 618     AliITSIOTrack *ioTrack=0;
 619         AliITSPid *pid=new AliITSPid(1000);  // oggi
 620
 621     tracktree1.Branch("ITStracks","AliITSIOTrack",&ioTrack,32000,0);
 622
 623     TDatabasePDG * db = new TDatabasePDG;
 624
 625     Int_t j;
 626     for (j=minTr; j<=maxTr; j++) {
 627         track=(AliTPCtrack*)tracks.UncheckedAt(j);
 628         if (!track) continue;
 629
 630         ///   mass definition ////////////////////////
 631     Double_t mass=0.13956995;
 632          Int_t pcode=211;  // a pion by default
 633
 634          if(realmass) {
 635         if(TMath::Abs(pcode)<20443) mass=db->GetParticle(pcode)->Mass();
 636          }
 637          else {
 638                  mass = track->GetMass();
 639 //               cout << "Mass = " << mass << endl;
 640          }
 641
 642
 643
 644          //   new propagation to the end of TPC
 645     Double_t xk=80.;
 646    // track->PropagateTo(xk,0.,0.); //Ne if it's still there   //attenzione funziona solo se modifica in TPC
 647         // Double_t xk=77.415;
 648          track->PropagateTo(xk, 28.94, 1.204e-3);
 649     xk-=0.005;
 650     track->PropagateTo(xk, 44.77,1.71); //Tedlar
 651     xk-=0.02;
 652     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 653     xk-=2.0;
 654     track->PropagateTo(xk, 41.28, 0.029);//Nomex
 655     xk-=0.02;
 656     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 657     xk-=0.005;
 658     track->PropagateTo(xk, 44.77, 1.71); //Tedlar
 659
 660     xk=61.;
 661    // track->PropagateTo(xk,0.,0.); //C02
 662          track->PropagateTo(xk,36.2,1.98e-3); //C02        //attenzione funziona solo se modifica in TPC
 663
 664     xk -=0.005;
 665     track->PropagateTo(xk, 24.01, 2.7);    //Al
 666     xk -=0.005;
 667     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 668     xk -=0.02;
 669     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 670     xk -=0.5;
 671     track->PropagateTo(xk, 41.28, 0.029);  //Nomex
 672     xk -=0.02;
 673     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 674     xk -=0.005;
 675     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 676     xk -=0.005;
 677     track->PropagateTo(xk, 24.01, 2.7);    //Al
 678
 679         ////////////////////////////////////////////////////////////////////////////////////////////////////////
 680         //AliITSTrackV1 trackITS(*track);
 681         AliITSTrackV1 trackITS(*track, fFieldFactor);
 682         //cout<<" fFieldFactor = "<<fFieldFactor<<"\n";
 683         trackITS.PutMass(mass);   //new to add mass to track
 684         if(fresult){ delete fresult; fresult=0;}
 685         fresult = new AliITSTrackV1(trackITS);
 686
 687         AliITSTrackV1 primaryTrack(trackITS);
 688         vgeant=(*fresult).GetVertex();
 689
 690         // Definition of dv and zv for vertex constraint
 691         Double_t sigmaDv=0.0050;  Double_t sigmaZv=0.010;
 692         //Double_t sigmaDv=0.0015;  Double_t sigmaZv=0.0015;
 693         Double_t uniform= gRandom->Uniform();
 694         Double_t signdv;
 695         if(uniform<=0.5) signdv=-1.;
 696         else
 697             signdv=1.;
 698
 699         Double_t vr=TMath::Sqrt(vgeant(0)*vgeant(0)+ vgeant(1)*vgeant(1));
 700         Double_t dv=gRandom->Gaus(signdv*vr,(Float_t)sigmaDv);
 701         Double_t zv=gRandom->Gaus(vgeant(2),(Float_t)sigmaZv);
 702         //cout<<" Dv e Zv = "<<dv<<" "<<zv<<"\n";
 703         trackITS.SetDv(dv);
 704         trackITS.SetZv(zv);
 705         trackITS.SetsigmaDv(sigmaDv);
 706         trackITS.SetsigmaZv(sigmaZv);
 707         (*fresult).SetDv(dv);
 708         (*fresult).SetZv(zv);
 709         (*fresult).SetsigmaDv(sigmaDv);
 710         (*fresult).SetsigmaZv(sigmaZv);
 711         primaryTrack.SetDv(dv);
 712         primaryTrack.SetZv(zv);
 713         primaryTrack.SetsigmaDv(sigmaDv);
 714         primaryTrack.SetsigmaZv(sigmaZv);
 715         primaryTrack.PrimaryTrack(frl);
 716         TVector  d2=primaryTrack.Getd2();
 717         TVector  tgl2=primaryTrack.Gettgl2();
 718         TVector  dtgl=primaryTrack.Getdtgl();
 719         trackITS.Setd2(d2); trackITS.Settgl2(tgl2);
 720         trackITS.Setdtgl(dtgl);
 721         (*fresult).Setd2(d2); (*fresult).Settgl2(tgl2);
 722         (*fresult).Setdtgl(dtgl);
 723         /*
 724           trackITS.SetVertex(vertex); trackITS.SetErrorVertex(ervertex);
 725           (*result).SetVertex(vertex);   (*result).SetErrorVertex(ervertex);
 726         */
 727         TList *list= new TList();
 728
 729         list->AddLast(&trackITS);
 730
 731         fPtref=TMath::Abs( (trackITS).GetPt() );
 732         //cout<<" fPtref = " <<fPtref<<"\n";
 733         if(fPtref>1.0) fChi2max=40.;
 734         if(fPtref<=1.0) fChi2max=20.;
 735         if(fPtref<0.4 ) fChi2max=100.;
 736         if(fPtref<0.2 ) fChi2max=40.;
 737         // if(fPtref<0.4 ) fChi2max=30.;
 738         // if(fPtref<0.2 ) fChi2max=20.;
 739         //if(fPtref<0.2 ) fChi2max=10.;
 740         //if(fPtref<0.1 ) fChi2max=5.;
 741         //cout << "\n Pt = " << fPtref <<"\n";  //stampa
 742         RecursiveTracking(list);
 743         list->Delete();
 744         delete list;
 745
 746         Int_t itot=-1;
 747         TVector vecTotLabRef(18);
 748         Int_t lay, k;
 749         for(lay=5; lay>=0; lay--) {
 750             TVector vecLabRef(3);
 751             vecLabRef=(*fresult).GetLabTrack(lay);
 752             Float_t clustZ=(*fresult).GetZclusterTrack( lay);
 753             for(k=0; k<3; k++){
 754                 Int_t lpp=(Int_t)vecLabRef(k);
 755                 if(lpp>=0) {
 756                     TParticle *p=(TParticle*) gAlice->Particle(lpp);
 757                     Int_t pcode=p->GetPdgCode();
 758                     if(pcode==11) vecLabRef(k)=p->GetFirstMother();
 759                 } // end if
 760                 itot++; vecTotLabRef(itot)=vecLabRef(k);
 761                 if(vecLabRef(k)==0. && clustZ == -1.) vecTotLabRef(itot) =-3.;
 762             } // end for k
 763         } // end for lay
 764         Long_t labref;
 765         Int_t freq;
 766         (*fresult).Search(vecTotLabRef, labref, freq);
 767
 768         //if(freq < 6) labref=-labref;        // cinque - sei
 769         if(freq < 5) labref=-labref;        // cinque - sei
 770         (*fresult).SetLabel(labref);
 771
 772         // cout<<" progressive track number = "<<j<<"\r";
 773         // cout<<j<<"\r";
 774         Int_t numOfCluster=(*fresult).GetNumClust();
 775         //cout<<" progressive track number = "<<j<<"\n";    // stampa
 776         Long_t labITS=(*fresult).GetLabel();
 777         //cout << " ITS track label = " << labITS << "\n";      // stampa
 778         Int_t lab=track->GetLabel();
 779         //cout << " TPC track label = " << lab <<"\n";      // stampa
 780         //propagation to vertex
 781
 782         Double_t rbeam=3.;
 783         if((*fresult).DoNotCross(rbeam)) continue;  //no intersection with beampipe
 784         (*fresult).Propagation(rbeam);
 785         Double_t c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44;
 786         (*fresult).GetCElements(c00,
 787                                 c10,c11,
 788                                 c20,c21,c22,
 789                                 c30,c31,c32,c33,
 790                                 c40,c41,c42,c43,c44);
 791
 792         Double_t pt=TMath::Abs((*fresult).GetPt());
 793         Double_t dr=(*fresult).GetD();
 794         Double_t z=(*fresult).GetZ();
 795         Double_t tgl=(*fresult).GetTgl();
 796         Double_t c=(*fresult).GetC();
 797         Double_t cy=c/2.;
 798         Double_t dz=z-(tgl/cy)*TMath::ASin((*fresult).Arga(rbeam));
 799         dz-=vgeant(2);
 800         // cout<<" dr e dz alla fine = "<<dr<<" "<<dz<<"\n"; getchar();
 801         Double_t phi=(*fresult).Getphi();
 802         Double_t phivertex = phi - TMath::ASin((*fresult).ArgA(rbeam));
 803         Double_t duepi=2.*TMath::Pi();
 804         if(phivertex>duepi) phivertex-=duepi;
 805         if(phivertex<0.) phivertex+=duepi;
 806         /////////////////////////////////////////////////////////////
 807         Int_t idmodule,idpoint;
 808         if(numOfCluster >=5)  {            // cinque - sei
 809             //if(numOfCluster ==6)  {            // cinque - sei
 810             AliITSIOTrack outTrack;
 811             ioTrack=&outTrack;
 812             ioTrack->SetStatePhi(phi);
 813             ioTrack->SetStateZ(z);
 814             ioTrack->SetStateD(dr);
 815             ioTrack->SetStateTgl(tgl);
 816             ioTrack->SetStateC(c);
 817             Double_t radius=(*fresult).Getrtrack();
 818             ioTrack->SetRadius(radius);
 819             Int_t charge;
 820             if(c>0.) charge=-1;  else charge=1;
 821             ioTrack->SetCharge(charge);
 822                 Double_t trackmass=(*fresult).GetMass();         // oggi
 823                 ioTrack->SetMass(trackmass);                     // oggi
 824             ioTrack->SetCovMatrix(c00,
 825                                   c10,c11,
 826                                   c20,c21,c22,
 827                                   c30,c31,c32,c33,
 828                                   c40,c41,c42,c43,c44);
 829             Double_t px=pt*TMath::Cos(phivertex);
 830             Double_t py=pt*TMath::Sin(phivertex);
 831             Double_t pz=pt*tgl;
 832             Double_t xtrack=dr*TMath::Sin(phivertex);
 833             Double_t ytrack=dr*TMath::Cos(phivertex);
 834             Double_t ztrack=dz+vgeant(2);
 835             ioTrack->SetPx(px);
 836             ioTrack->SetPy(py);
 837             ioTrack->SetPz(pz);
 838             ioTrack->SetX(xtrack);
 839             ioTrack->SetY(ytrack);
 840             ioTrack->SetZ(ztrack);
 841             ioTrack->SetLabel(labITS);
 842             ioTrack->SetTPCLabel(lab);
 843                  ioTrack->SetDz(dz);
 844             Int_t il;
 845             /*
 846                 for(il=0;il<6; il++){
 847                 ioTrack->SetIdPoint(il,(*fresult).GetIdPoint(il));
 848                 ioTrack->SetIdModule(il,(*fresult).GetIdModule(il));
 849             } // end for il
 850             */
 851             //tracktree1.Fill();
 852                 Float_t q[4]={-1.,-1.,-1.,-1.};
 853             Float_t  globaldedx=0.;
 854             for (il=0;il<6;il++) {
 855                 idpoint=(*fresult).GetIdPoint(il);
 856                 idmodule=(*fresult).GetIdModule(il);
 857                 if(idmodule>0.) *(fvettid[idmodule]+idpoint)=1;
 858
 859                 ioTrack->SetIdPoint(il,idpoint);
 860                 ioTrack->SetIdModule(il,idmodule);
 861                 ////  for q definition
 862                 if(il>1){
 863                   if(idmodule>0.){
 864                     fITS->ResetRecPoints();
 865                     gAlice->TreeR()->GetEvent(idmodule);
 866                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(idpoint);
 867                     q[il-2]=recp->GetQ()*(*fresult).Getfcor(il-2);
 868                   }
 869                 }
 870             } // end for il
 871                 q[0]/=280.; q[1]/=280.;
 872             q[2]/=38.; q[3]/=38.;
 873
 874  // cout<<" q prima = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 875
 876      Int_t swap;
 877   do{
 878     swap=0;
 879     for (il=0; il<3; il++) {
 880       if (q[il]<=q[il+1]) continue;
 881       Float_t tmp=q[il];
 882       q[il]=q[il+1]; q[il+1]=tmp;
 883       swap++;
 884     }
 885   } while(swap);
 886
 887
 888   // cout<<" q dopo = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 889
 890     if(q[0]<0.) {
 891       q[0]=q[1];
 892       q[1]=q[2];
 893       q[2]=q[3];
 894       q[3]=-1.;
 895     }
 896
 897   // cout<<" q  dopo if = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 898
 899     globaldedx=(q[0]+q[1])/2.;
 900
 901    // if(q[3]> 0.) globaldedx=(q[0]+q[1]+q[2]+q[3])/4.;
 902    //      else    globaldedx=(q[0]+q[1]+q[2])/3.;
 903
 904     ioTrack->SetdEdx(globaldedx);
 905     ioTrack->SetPid(pid->GetPcode(ioTrack));
 906
 907             tracktree1.Fill();
 908         } // end if on numOfCluster
 909         //gObjectTable->Print();    // stampa memoria
 910     }  //  end for (int j=minTr; j<=maxTr; j++)
 911     delete db;
 912     static Bool_t first=kTRUE;
 913     static TFile *tfile;
 914     if(first) {
 915         tfile=new TFile("itstracks.root","RECREATE");
 916         //cout<<"I have opened itstracks.root file "<<endl;
 917     } // end if
 918     first=kFALSE;
 919     tfile->cd();
 920     tfile->ls();
 921     char hname[30];
 922     sprintf(hname,"TreeT%d",evNumber);
 923         cout << "Number of saved ITS tracks " << tracktree1.GetEntries() << endl;
 924     tracktree1.Write(hname);
 925
 926     TTree *fAli=gAlice->TreeK();
 927     TFile *fileAli=0;
 928     if (fAli) fileAli =fAli->GetCurrentFile();
 929     fileAli->cd();
 930     ////////////////////////////////////////////////////////////////////
 931
 932     printf("delete vectors\n");
 933     if(np) delete [] np;
 934     if(fvettid) delete [] fvettid;
 935     if(fresult) {delete fresult; fresult=0;}
 936 }
 937 //______________________________________________________________________
 938 void AliITSTrackerV1::RecursiveTracking(TList *trackITSlist) {
 939     //   This function perform the recursive tracking in ITS detectors
 940     // reference is a pointer to the final best track
 941     // Origin  A. Badala' and G.S. Pappalardo:
 942     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 943     // The authors thank Mariana Bondila to have help them to resolve some
 944     // problems.  July-2000
 945
 946     //Rlayer[0]=4.; Rlayer[1]=7.;  Rlayer[2]=14.9;
 947     // Rlayer[3]=23.8;  Rlayer[4]=39.1;  Rlayer[5]=43.6; //vecchio
 948
 949     //////////////////////
 950     Float_t sigmaphil[6], sigmazl[6];
 951     sigmaphil[0]=1.44e-6/(fAvrad[0]*fAvrad[0]);
 952     sigmaphil[1]=1.44e-6/(fAvrad[1]*fAvrad[1]);
 953     sigmaphil[2]=1.444e-5/(fAvrad[2]*fAvrad[2]);
 954     sigmaphil[3]=1.444e-5/(fAvrad[3]*fAvrad[3]);
 955     sigmaphil[4]=4e-6/(fAvrad[4]*fAvrad[4]);
 956     sigmaphil[5]=4e-6/(fAvrad[5]*fAvrad[5]);
 957     sigmazl[0]=1e-2;
 958     sigmazl[1]=1e-2;
 959     sigmazl[2]=7.84e-4;
 960     sigmazl[3]=7.84e-4;
 961     sigmazl[4]=0.6889;
 962     sigmazl[5]=0.6889;
 963     ///////////////////////////////////////////////////////////
 964     Int_t index;
 965     AliITSgeom *g1 = fITS->GetITSgeom();
 966     AliITSRecPoint *recp;
 967     for(index =0; index<trackITSlist->GetSize(); index++) {
 968         AliITSTrackV1 *trackITS = (AliITSTrackV1 *) trackITSlist->At(index);
 969         if((*trackITS).GetLayer()==7) fresult->SetChi2(10.223e140);
 970         // cout <<" Layer inizio = "<<(*trackITS).GetLayer()<<"\n";
 971         //  cout<<"fvtrack =" <<"\n";
 972         //  cout << (*trackITS)(0) << " "<<(*trackITS)(1)<<" "
 973         //       <<(*trackITS)(2)<<" "<<(*trackITS)(3)<<" "
 974         //       <<(*trackITS)(4)<<"\n";
 975         //  cout<< " rtrack = "<<(*trackITS).Getrtrack()<<"\n";
 976         //  cout<< " Pt = "<<(*trackITS).GetPt()<<"\n";
 977         //  getchar();
 978         Double_t chi2Now, chi2Ref;
 979         Float_t numClustRef = fresult->GetNumClust();
 980         if((*trackITS).GetLayer()==1 ) {
 981             chi2Now = trackITS->GetChi2();
 982             Float_t numClustNow = trackITS->GetNumClust();
 983             if(trackITS->GetNumClust())
 984                 chi2Now /= (Double_t)trackITS->GetNumClust();
 985             chi2Ref = fresult->GetChi2();
 986             if(fresult->GetNumClust())
 987                 chi2Ref /= (Double_t)fresult->GetNumClust();
 988             //cout<<" chi2Now and chi2Ref = "<<chi2Now<<" "<<chi2Ref<<"\n";
 989             if( numClustNow > numClustRef ) {*fresult = *trackITS;}
 990             if((numClustNow == numClustRef )&&
 991                (chi2Now < chi2Ref))  {
 992                 *fresult = *trackITS;
 993             } // end if
 994             continue;
 995         } // end if
 996
 997         if(trackITS->Getfnoclust()>=2)  continue;
 998         Float_t numClustNow = trackITS->GetNumClust();
 999         if(numClustNow) {
1000             chi2Now = trackITS->GetChi2();
1001
1002             if(numClustNow<numClustRef && chi2Now>fresult->GetChi2()) continue;
1003             //cout<<" chi2Now =  "<<chi2Now<<"\n";
1004
1005             chi2Now/=numClustNow;
1006             if(fPtref > 1.0 && chi2Now > 30.) continue;
1007             if((fPtref >= 0.6 && fPtref<=1.0) && chi2Now > 40.) continue;
1008             // if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 40.) continue;
1009             // if(fPtref <= 0.2 && chi2Now > 8.) continue;
1010             if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 30.) continue;
1011             if(fPtref <= 0.2 && chi2Now > 7.) continue;
1012             /////////////////////////////
1013         } // end if
1014
1015         Int_t layerInit = (*trackITS).GetLayer();
1016         Int_t layernew = layerInit - 2;// -1 for new layer, -1 for matrix index
1017         TList listoftrack;
1018         Int_t ladp, ladm, detp,detm,ladinters,detinters;
1019         Int_t layerfin=layerInit-1;
1020         // cout<<"Prima di intersection \n";
1021         Int_t  outinters=Intersection(*trackITS,layerfin,ladinters,detinters);
1022         // cout<<" outinters = "<<outinters<<"\n";
1023         //  cout<<" Layer ladder detector intersection ="
1024         //      <<layerfin<<" "<<ladinters<<" "<<detinters<<"\n";
1025         //  cout << " phiinters zinters = "<<(*trackITS)(0)
1026         //       << " "<<(*trackITS)(1)<<"\n"; getchar();
1027         if(outinters==-1) continue;
1028         Int_t flaghit=0;
1029         (*trackITS).SetLayer(layerfin);  // oggi
1030         (*trackITS).Setfcor();           // oggi
1031         if(outinters==0){
1032             TVector toucLad(9), toucDet(9);
1033             Int_t lycur=layerfin;
1034             ladp=ladinters+1;
1035             ladm=ladinters-1;
1036             if(ladm <= 0) ladm=fNlad[layerfin-1];
1037             if(ladp > fNlad[layerfin-1]) ladp=1;
1038             detp=detinters+1;
1039             detm=detinters-1;
1040             Int_t idetot=1;
1041             /*
1042               toucLad(0)=ladinters; toucLad(1)=ladm; toucLad(2)=ladp;
1043               toucLad(3)=ladinters; toucLad(4)=ladm; toucLad(5)=ladp;
1044               toucLad(6)=ladinters; toucLad(7)=ladm; toucLad(8)=ladp;
1045               toucDet(0)=detinters; toucDet(1)=detinters; toucDet(2)=detinters;
1046               if(detm > 0 && detp <= fNdet[layerfin-1]) {
1047                    idetot=9;
1048                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1049                    toucDet(6)=detp; toucDet(7)=detp; toucDet(8)=detp;
1050               } // end if
1051               if(detm > 0 && detp > fNdet[layerfin-1]) {
1052                    idetot=6;
1053                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1054              } // end if
1055              if(detm <= 0 && detp <= fNdet[layerfin-1]) {
1056                   idetot=6;
1057                   toucDet(3)=detp; toucDet(4)=detp; toucDet(5)=detp;
1058              } // end if
1059             */
1060             Float_t epsphi=5.0, epsz=5.0;
1061             if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1062             // new definition of idetot e toucLad e toucDet to be
1063             // transformed in a method
1064             // these values could be modified
1065             Float_t pigre=TMath::Pi();
1066             Float_t rangephi=5., rangez=5.;
1067             if(layerfin==1 || layerfin ==2){
1068                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1069                                                 (*trackITS).GetSigmaphi());
1070                 rangez = 40.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1071                                               (*trackITS).GetSigmaZ());
1072             } // end if
1073             if(layerfin==3 || layerfin ==4){
1074                 //rangephi=30.*fepsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1075                 //                                 (*trackITS).GetSigmaphi());
1076                 //rangez = 40.*fepsz*TMath::Sqrt(sigmazl[layerfin-1]+
1077                 //                               (*trackITS).GetSigmaZ());
1078                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1079                                                 (*trackITS).GetSigmaphi());
1080                 rangez = 50.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1081                                               (*trackITS).GetSigmaZ());
1082             } // end if
1083             if(layerfin==5 || layerfin ==6){
1084                 rangephi=20.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1085                                                 (*trackITS).GetSigmaphi());
1086                 rangez =5.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1087                                             (*trackITS).GetSigmaZ());
1088             } // end if
1089             Float_t phinters, zinters;
1090             phinters=(*trackITS).Getphi();
1091             zinters=(*trackITS).GetZ();
1092             Float_t distz = 0.0;
1093             Float_t phicm, phicp, distphim, distphip;
1094             phicm=phinters;
1095                  if(phinters>fphimax[layerfin-1][ladm-1]) phicm=phinters-2*pigre;  //corretto il 20-11-2001
1096                  distphim=TMath::Abs(phicm-fphimax[layerfin-1][ladm-1]);  //corretto il 20-11-2001
1097             phicp=phinters;
1098                  //cout<<" fNlad[layerfin-1] e ladp = "<<fNlad[layerfin-1]<<" "<<ladp<<endl;
1099                  if(phinters>fphimin[layerfin-1][ladp-1]) phicp=phinters-2.*pigre;   //corretto il 20-11-2001
1100                  distphip=TMath::Abs(phicp-fphimin[layerfin-1][ladp-1]);      //corretto il 20-11-2001
1101             Int_t flagzmin=0;
1102             Int_t flagzmax=0;
1103             idetot=1;
1104             toucLad(0)=ladinters; toucDet(0)=detinters;
1105             if(detm>0) distz=TMath::Abs(zinters-fzmax[layerfin-1][detm-1]);
1106             if(detm>0 && rangez>=distz){
1107                 flagzmin=1;
1108                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detm;
1109                 if(rangephi>=distphim){
1110                     idetot++;
1111                     toucLad(idetot-1)=ladm;
1112                     toucDet(idetot-1)=detinters;
1113                     idetot++;
1114                     toucLad(idetot-1)=ladm;
1115                     toucDet(idetot-1)=detm;
1116                 } // end if
1117                 if(rangephi>=distphip){
1118                     idetot++;
1119                     toucLad(idetot-1)=ladp;
1120                     toucDet(idetot-1)=detinters;
1121                     idetot++;
1122                     toucLad(idetot-1)=ladp;
1123                     toucDet(idetot-1)=detm;
1124                 } // end if
1125             }  //end detm>0....
1126             if(detp<=fNdet[layerfin-1])
1127                 distz=TMath::Abs(zinters-fzmin[layerfin-1][detp-1]);
1128             if(detp<=fNdet[layerfin-1] && rangez>=distz){
1129                 flagzmax=1;
1130                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detp;
1131                 if(rangephi>=distphim){
1132                     idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detp;
1133                     if(flagzmin == 0) {
1134                         idetot++;
1135                         toucLad(idetot-1)=ladm;
1136                         toucDet(idetot-1)=detinters;
1137                     } // end if
1138                 } // end if
1139                 if(rangephi>=distphip){
1140                     idetot++;
1141                     toucLad(idetot-1)=ladp;
1142                     toucDet(idetot-1)=detp;
1143                     if(flagzmin == 0) {
1144                         idetot++;
1145                         toucLad(idetot-1)=ladp;
1146                         toucDet(idetot-1)=detinters;
1147                     } // end if
1148                 } // end if
1149             }  //end detm<fNdet[.......
1150
1151             if(flagzmin == 0 && flagzmax==0){
1152                 if(rangephi>=distphim){
1153                     idetot++;
1154                     toucLad(idetot-1)=ladm;
1155                     toucDet(idetot-1)=detinters;
1156                 } // end if
1157                 if(rangephi>=distphip){
1158                     idetot++;
1159                     toucLad(idetot-1)=ladp;
1160                     toucDet(idetot-1)=detinters;
1161                 } // end if
1162             } // end if
1163             ////////////////////////////////////////////////////////////
1164             Int_t iriv;
1165             for (iriv=0; iriv<idetot; iriv++) {  //for on detectors
1166                 ///////////////////////////////////////////////////////
1167                 /*** Rec points sorted by module *****/
1168                 /**************************************/
1169                 Int_t indexmod;
1170                 indexmod = g1->GetModuleIndex(lycur,(Int_t)toucLad(iriv),
1171                                               (Int_t)toucDet(iriv));
1172                 fITS->ResetRecPoints();
1173                 gAlice->TreeR()->GetEvent(indexmod);
1174                 Int_t npoints=frecPoints->GetEntries();
1175
1176                 Int_t indnew;
1177                 for(indnew=0; indnew<npoints; indnew++){
1178                     if (*(fvettid[indexmod]+indnew)==0)
1179                         recp =(AliITSRecPoint*)frecPoints->UncheckedAt(indnew);
1180                     else
1181                         continue;
1182                     TVector cluster(3),vecclust(9);
1183                     //vecclust(6)=vecclust(7)=vecclust(8)=-1.;
1184                     Double_t sigma[2];
1185   // now vecclust is with cylindrical cohordinates
1186                vecclust(0)=(Float_t)fRecCylR[indexmod][indnew];
1187                vecclust(1)=(Float_t)fRecCylPhi[indexmod][indnew];
1188                vecclust(2)=(Float_t)fRecCylZ[indexmod][indnew];
1189                     vecclust(3) = (Float_t)recp->fTracks[0];
1190                     vecclust(4) = (Float_t)indnew;
1191                     vecclust(5) = (Float_t)indexmod;
1192                     vecclust(6) = (Float_t)recp->fTracks[0];
1193                     vecclust(7) = (Float_t)recp->fTracks[1];
1194                     vecclust(8) = (Float_t)recp->fTracks[2];
1195                     sigma[0] = (Double_t)  recp->GetSigmaX2();
1196                     sigma[1] = (Double_t) recp->GetSigmaZ2();
1197
1198                          cluster(0)=fRecCylR[indexmod][indnew];
1199           cluster(1)=fRecCylPhi[indexmod][indnew];
1200                          cluster(2)=fRecCylZ[indexmod][indnew];
1201
1202                     // cout<<" layer = "<<play<<"\n";
1203                     // cout<<" cluster prima = "<<vecclust(0)<<" "
1204                     //     <<vecclust(1)<<" "
1205                     //     <<vecclust(2)<<"\n"; getchar();
1206
1207                     Float_t sigmatotphi, sigmatotz;
1208                     // Float_t epsphi=5.0, epsz=5.0;
1209                     //if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1210                     Double_t rTrack=(*trackITS).Getrtrack();
1211                     Double_t sigmaphi=sigma[0]/(rTrack*rTrack);
1212                     sigmatotphi=epsphi*TMath::Sqrt(sigmaphi +
1213                                                    (*trackITS).GetSigmaphi());
1214                     sigmatotz=epsz*TMath::Sqrt(sigma[1] +
1215                                                (*trackITS).GetSigmaZ());
1216                     //cout<<"cluster e sigmatotphi e track = "<<cluster(0)
1217                     //    <<" "<<cluster(1)<<" "<<sigmatotphi<<" "
1218                     //    <<vecclust(3)<<"\n";
1219                     //if(vecclust(3)==481) getchar();
1220                     if(cluster(1)<6. && (*trackITS).Getphi()>6.)
1221                         cluster(1)=cluster(1)+(2.*TMath::Pi());
1222                     if(cluster(1)>6. && (*trackITS).Getphi()<6.)
1223                         cluster(1)=cluster(1)-(2.*TMath::Pi());
1224                     if(TMath::Abs(cluster(1)-(*trackITS).Getphi())>sigmatotphi)
1225                         continue;
1226                     // cout<<" supero sigmaphi \n";
1227                     AliITSTrackV1 *newTrack = new AliITSTrackV1((*trackITS));
1228                     //(*newTrack).SetLayer((*trackITS).GetLayer()-1);
1229                     if (TMath::Abs(rTrack-cluster(0))/rTrack>1e-6)
1230                         (*newTrack).Correct(Double_t(cluster(0)));
1231                     //cout<<" cluster(2) e(*newTrack).GetZ()="<<cluster(2)<<" "
1232                     //    << (*newTrack).GetZ()<<"\n";
1233                     if(TMath::Abs(cluster(2)-(*newTrack).GetZ()) > sigmatotz){
1234                         delete newTrack;
1235                         continue;
1236                     } // end if
1237                     Double_t sigmanew[2];
1238                     sigmanew[0]= sigmaphi;
1239                     sigmanew[1]=sigma[1];
1240                     Double_t m[2];
1241                     m[0]=cluster(1);
1242                     m[1]=cluster(2);
1243                     //  Double_t chi2pred=newTrack->GetPredChi2(m,sigmanew);
1244                     // cout<<" chi2pred = "<<chi2pred<<"\n";
1245                     // if(chi2pred>fChi2max) continue; //aggiunto il 30-7-2001
1246                     if(iriv == 0) flaghit=1;
1247                     (*newTrack).AddMS(frl);  // add the multiple scattering
1248                                              //matrix to the covariance matrix
1249                     (*newTrack).AddEL(frl,1.,0);
1250
1251                     if(fflagvert){
1252                         KalmanFilterVert(newTrack,cluster,sigmanew);
1253                         //KalmanFilterVert(newTrack,cluster,sigmanew,chi2pred);
1254                     }else{
1255                         KalmanFilter(newTrack,cluster,sigmanew);
1256                     } // end if
1257                     (*newTrack).PutCluster(layernew, vecclust);
1258                     newTrack->AddClustInTrack();
1259                     listoftrack.AddLast(newTrack);
1260                 }   // end for indnew
1261             }  // end of for on detectors (iriv)
1262         }//end if(outinters==0)
1263
1264         if(flaghit==0 || outinters==-2) {
1265             AliITSTrackV1 *newTrack = new AliITSTrackV1(*trackITS);
1266             (*newTrack).Setfnoclust();
1267             //(*newTrack).SetLayer((*trackITS).GetLayer()-1);
1268             (*newTrack).AddMS(frl);  // add the multiple scattering matrix
1269                                      // to the covariance matrix
1270             (*newTrack).AddEL(frl,1.,0);
1271             listoftrack.AddLast(newTrack);
1272         } // end if
1273
1274         //gObjectTable->Print();   // stampa memoria
1275
1276         RecursiveTracking(&listoftrack);
1277         listoftrack.Delete();
1278     } // end of for on tracks (index)
1279
1280     //gObjectTable->Print();   // stampa memoria
1281 }
1282 //______________________________________________________________________
1283 Int_t AliITSTrackerV1::Intersection(AliITSTrackV1 &track,Int_t layer,
1284                                     Int_t &ladder,Int_t &detector) {
1285     // Origin  A. Badala' and G.S. Pappalardo
1286     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1287     // Found the intersection and the detector
1288
1289     Double_t rk=fAvrad[layer-1];
1290     if(track.DoNotCross(rk)){ /*cout<< " Do not cross \n";*/ return -1;}
1291     track.Propagation(rk);
1292     Double_t zinters=track.GetZ();
1293     Double_t phinters=track.Getphi();
1294     //cout<<"zinters = "<<zinters<<"  phinters = "<<phinters<<"\n";
1295
1296     TVector det(9);
1297     TVector listDet(2);
1298     TVector distZCenter(2);
1299
1300     Int_t iz=0;
1301     Int_t iD;
1302     for(iD = 1; iD<= fNdet[layer-1]; iD++) {
1303         if(zinters > fzmin[layer-1][iD-1] && zinters <= fzmax[layer-1][iD-1]) {
1304             if(iz>1) {
1305                 cout<< " Errore su iz in Intersection \n";
1306                 getchar();
1307             }else {
1308                 listDet(iz)= iD; distZCenter(iz)=TMath::Abs(zinters-det(2));
1309                 iz++;
1310             } // end if
1311         } // end if
1312     } // end for iD
1313
1314     if(iz==0) {/* cout<< " No detector along Z \n";*/ return -2;}
1315     detector=Int_t (listDet(0));
1316     if(iz>1 && (distZCenter(0)>distZCenter(1)))   detector=Int_t (listDet(1));
1317
1318     TVector listLad(2);
1319     TVector distPhiCenter(2);
1320     Int_t ip=0;
1321     Double_t pigre=TMath::Pi();
1322     Int_t iLd;
1323     for(iLd = 1; iLd<= fNlad[layer-1]; iLd++) {
1324         Double_t phimin=fphimin[layer-1][iLd-1];
1325         Double_t phimax=fphimax[layer-1][iLd-1];
1326         Double_t phidet=fphidet[layer-1][iLd-1];
1327         Double_t phiconfr=phinters;
1328         if(phimin>phimax) {
1329             //if(phimin <5.5) {cout<<" Error in Intersection for phi \n";
1330             // getchar();}
1331             phimin-=(2.*pigre);
1332             if(phinters>(1.5*pigre)) phiconfr=phinters-(2.*pigre);
1333             if(phidet>(1.5*pigre)) phidet-=(2.*pigre);
1334         } // end if
1335         if(phiconfr>phimin && phiconfr<= phimax) {
1336             if(ip>1) {
1337                 cout<< " Errore su ip in Intersection \n"; getchar();
1338             }else  {
1339                 listLad(ip)= iLd;
1340                 distPhiCenter(ip)=TMath::Abs(phiconfr-phidet); ip++;
1341             } // end if
1342         } // end if
1343     } // end for iLd
1344     if(ip==0) { cout<< " No detector along phi \n"; getchar();}
1345     ladder=Int_t (listLad(0));
1346     if(ip>1 && (distPhiCenter(0)>distPhiCenter(1)))  ladder=Int_t (listLad(1));
1347     return 0;
1348 }
1349 //______________________________________________________________________
1350 void AliITSTrackerV1::KalmanFilter(AliITSTrackV1 *newTrack,TVector &cluster,
1351                                    Double_t sigma[2]){
1352     //Origin  A. Badala' and G.S. Pappalardo:
1353     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1354     // Kalman filter without vertex constraint
1355     ////// Evaluation of the measurement vector ////////////////////////
1356     Double_t m[2];
1357     Double_t rk,phik,zk;
1358     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1359     m[0]=phik;    m[1]=zk;
1360     //////////////////////// Evaluation of the error matrix V  /////////
1361     Double_t v00=sigma[0];
1362     Double_t v11=sigma[1];
1363     ////////////////////////////////////////////////////////////////////
1364     Double_t cin00,cin10,cin20,cin30,cin40,cin11,cin21,cin31,cin41,cin22,
1365              cin32,cin42,cin33,cin43,cin44;
1366
1367     newTrack->GetCElements(cin00,
1368                            cin10,cin11,
1369                            cin20,cin21,cin22,
1370                            cin30,cin31,cin32,cin33,
1371                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1372     Double_t rold00=cin00+v00;
1373     Double_t rold10=cin10;
1374     Double_t rold11=cin11+v11;
1375     ////////////////////// R matrix inversion  /////////////////////////
1376     Double_t det=rold00*rold11-rold10*rold10;
1377     Double_t r00=rold11/det;
1378     Double_t r10=-rold10/det;
1379     Double_t r11=rold00/det;
1380     ////////////////////////////////////////////////////////////////////
1381     Double_t k00=cin00*r00+cin10*r10;
1382     Double_t k01=cin00*r10+cin10*r11;
1383     Double_t k10=cin10*r00+cin11*r10;
1384     Double_t k11=cin10*r10+cin11*r11;
1385     Double_t k20=cin20*r00+cin21*r10;
1386     Double_t k21=cin20*r10+cin21*r11;
1387     Double_t k30=cin30*r00+cin31*r10;
1388     Double_t k31=cin30*r10+cin31*r11;
1389     Double_t k40=cin40*r00+cin41*r10;
1390     Double_t k41=cin40*r10+cin41*r11;
1391     Double_t x0,x1,x2,x3,x4;
1392     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1393     Double_t savex0=x0, savex1=x1;
1394     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1);
1395     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1);
1396     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1);
1397     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1);
1398     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1);
1399     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1400     c00=cin00-k00*cin00-k01*cin10;
1401     c10=cin10-k00*cin10-k01*cin11;
1402     c20=cin20-k00*cin20-k01*cin21;
1403     c30=cin30-k00*cin30-k01*cin31;
1404     c40=cin40-k00*cin40-k01*cin41;
1405     c11=cin11-k10*cin10-k11*cin11;
1406     c21=cin21-k10*cin20-k11*cin21;
1407     c31=cin31-k10*cin30-k11*cin31;
1408     c41=cin41-k10*cin40-k11*cin41;
1409     c22=cin22-k20*cin20-k21*cin21;
1410     c32=cin32-k20*cin30-k21*cin31;
1411     c42=cin42-k20*cin40-k21*cin41;
1412     c33=cin33-k30*cin30-k31*cin31;
1413     c43=cin43-k30*cin40-k31*cin41;
1414     c44=cin44-k40*cin40-k41*cin41;
1415     newTrack->PutXElements(x0,x1,x2,x3,x4);  // put the new state vector
1416     newTrack->PutCElements(c00,
1417                            c10,c11,
1418                            c20,c21,c22,
1419                            c30,c31,c32,c33,
1420                            c40,c41,c42,c43,c44); // put in track the
1421                                                  // new cov matrix
1422     Double_t vmcold00=v00-c00;
1423     Double_t vmcold10=-c10;
1424     Double_t vmcold11=v11-c11;
1425     ////////////////////// Matrix vmc inversion  ///////////////////////
1426     det=vmcold00*vmcold11-vmcold10*vmcold10;
1427     Double_t vmc00=vmcold11/det;
1428     Double_t vmc10=-vmcold10/det;
1429     Double_t vmc11=vmcold00/det;
1430     ////////////////////////////////////////////////////////////////////
1431   Double_t chi2=(m[0]-x0)*( vmc00*(m[0]-x0) + 2.*vmc10*(m[1]-x1) ) +
1432                 (m[1]-x1)*vmc11*(m[1]-x1);
1433   newTrack->SetChi2(newTrack->GetChi2()+chi2);
1434 }
1435 //----------------------------------------------------------------------
1436 //void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1437 //                                       TVector &cluster,Double_t sigma[2]){
1438 void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1439                                        TVector &cluster,Double_t sigma[2]
1440                                        /*, Double_t chi2pred*/){
1441     //Origin  A. Badala' and G.S. Pappalardo:
1442     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1443     // Kalman filter with vertex constraint
1444     ///////////////////// Evaluation of the measurement vector m ////////
1445     Double_t m[4];
1446     Double_t rk,phik,zk;
1447     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1448     m[0]=phik;    m[1]=zk;
1449     Double_t cc=(*newTrack).GetC();
1450     Double_t zv=(*newTrack).GetZv();
1451     Double_t dv=(*newTrack).GetDv();
1452     Double_t cy=cc/2.;
1453     Double_t tgl= (zk-zv)*cy/TMath::ASin(cy*rk);
1454     m[2]=dv;    m[3]=tgl;
1455     /////////////////////// Evaluation of the error matrix V  //////////
1456     Int_t layer=newTrack->GetLayer();
1457     Double_t v00=sigma[0];
1458     Double_t v11=sigma[1];
1459     Double_t v31=sigma[1]/rk;
1460     Double_t sigmaDv=newTrack->GetsigmaDv();
1461     Double_t v22=sigmaDv*sigmaDv  + newTrack->Getd2(layer-1);
1462     Double_t v32=newTrack->Getdtgl(layer-1);
1463     Double_t sigmaZv=newTrack->GetsigmaZv();
1464     Double_t v33=(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+newTrack->Gettgl2(layer-1);
1465     //////////////////////////////////////////////////////////////////
1466     Double_t cin00,cin10,cin11,cin20,cin21,cin22,
1467              cin30,cin31,cin32,cin33,cin40,cin41,cin42,cin43,cin44;
1468     newTrack->GetCElements(cin00,
1469                            cin10,cin11,
1470                            cin20,cin21,cin22,
1471                            cin30,cin31,cin32,cin33,
1472                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1473     Double_t r[4][4];
1474     r[0][0]=cin00+v00;
1475     r[1][0]=cin10;
1476     r[2][0]=cin20;
1477     r[3][0]=cin30;
1478     r[1][1]=cin11+v11;
1479     r[2][1]=cin21;
1480     r[3][1]=cin31+sigma[1]/rk;
1481     r[2][2]=cin22+sigmaDv*sigmaDv+newTrack->Getd2(layer-1);
1482     r[3][2]=cin32+newTrack->Getdtgl(layer-1);
1483     r[3][3]=cin33+(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+
1484                                     newTrack->Gettgl2(layer-1);
1485     r[0][1]=r[1][0]; r[0][2]=r[2][0]; r[0][3]=r[3][0];
1486     r[1][2]=r[2][1]; r[1][3]=r[3][1]; r[2][3]=r[3][2];
1487     /////////////////////  Matrix R inversion //////////////////////////
1488     const Int_t kn=4;
1489     Double_t big, hold;
1490     Double_t d=1.;
1491     Int_t ll[kn],mm[kn];
1492     Int_t i,j,k;
1493
1494     for(k=0; k<kn; k++) {
1495         ll[k]=k;
1496         mm[k]=k;
1497         big=r[k][k];
1498         for(j=k; j<kn ; j++) {
1499             for (i=j; i<kn; i++) {
1500                 if(TMath::Abs(big) < TMath::Abs(r[i][j]) ) {
1501                     big=r[i][j];
1502                     ll[k]=i;
1503                     mm[k]=j;
1504                 } // end if
1505             } // end for i
1506         } // end for j
1507         //
1508         j= ll[k];
1509         if(j > k) {
1510             for(i=0; i<kn; i++) {
1511                 hold=-r[k][i];
1512                 r[k][i]=r[j][i];
1513                 r[j][i]=hold;
1514             } // end for i
1515         }// end if
1516         //
1517         i=mm[k];
1518         if(i > k ) {
1519             for(j=0; j<kn; j++) {
1520                 hold=-r[j][k];
1521                 r[j][k]=r[j][i];
1522                 r[j][i]=hold;
1523             } // end for j
1524         } // end if
1525         //
1526         if(!big) {
1527             d=0.;
1528             cout << "Singular matrix\n";
1529         } // end if
1530         for(i=0; i<kn; i++) {
1531             if(i == k) { continue; }
1532             r[i][k]=r[i][k]/(-big);
1533         } // end for i
1534         //
1535         for(i=0; i<kn; i++) {
1536             hold=r[i][k];
1537             for(j=0; j<kn; j++) {
1538                 if(i == k || j == k) continue;
1539                 r[i][j]=hold*r[k][j]+r[i][j];
1540             } // end for j
1541         } // end of ri
1542         //
1543         for(j=0; j<kn; j++) {
1544             if(j == k) continue;
1545             r[k][j]=r[k][j]/big;
1546         } // end for j
1547         //
1548         d=d*big;
1549         //
1550         r[k][k]=1./big;
1551     } // end for k
1552     //
1553     for(k=kn-1; k>=0; k--) {
1554         i=ll[k];
1555         if(i > k) {
1556             for (j=0; j<kn; j++) {
1557                 hold=r[j][k];
1558                 r[j][k]=-r[j][i];
1559                 r[j][i]=hold;
1560             } // end for j
1561         } // end if i
1562         j=mm[k];
1563         if(j > k) {
1564             for (i=0; i<kn; i++) {
1565                 hold=r[k][i];
1566                 r[k][i]=-r[j][i];
1567                 r[j][i]=hold;
1568             } // end for i
1569         } // end if
1570     } // end for k
1571     ////////////////////////////////////////////////////////////////////
1572     Double_t k00=cin00*r[0][0]+cin10*r[1][0]+cin20*r[2][0]+cin30*r[3][0];
1573     Double_t k01=cin00*r[1][0]+cin10*r[1][1]+cin20*r[2][1]+cin30*r[3][1];
1574     Double_t k02=cin00*r[2][0]+cin10*r[2][1]+cin20*r[2][2]+cin30*r[3][2];
1575     Double_t k03=cin00*r[3][0]+cin10*r[3][1]+cin20*r[3][2]+cin30*r[3][3];
1576     Double_t k10=cin10*r[0][0]+cin11*r[1][0]+cin21*r[2][0]+cin31*r[3][0];
1577     Double_t k11=cin10*r[1][0]+cin11*r[1][1]+cin21*r[2][1]+cin31*r[3][1];
1578     Double_t k12=cin10*r[2][0]+cin11*r[2][1]+cin21*r[2][2]+cin31*r[3][2];
1579     Double_t k13=cin10*r[3][0]+cin11*r[3][1]+cin21*r[3][2]+cin31*r[3][3];
1580     Double_t k20=cin20*r[0][0]+cin21*r[1][0]+cin22*r[2][0]+cin32*r[3][0];
1581     Double_t k21=cin20*r[1][0]+cin21*r[1][1]+cin22*r[2][1]+cin32*r[3][1];
1582     Double_t k22=cin20*r[2][0]+cin21*r[2][1]+cin22*r[2][2]+cin32*r[3][2];
1583     Double_t k23=cin20*r[3][0]+cin21*r[3][1]+cin22*r[3][2]+cin32*r[3][3];
1584     Double_t k30=cin30*r[0][0]+cin31*r[1][0]+cin32*r[2][0]+cin33*r[3][0];
1585     Double_t k31=cin30*r[1][0]+cin31*r[1][1]+cin32*r[2][1]+cin33*r[3][1];
1586     Double_t k32=cin30*r[2][0]+cin31*r[2][1]+cin32*r[2][2]+cin33*r[3][2];
1587     Double_t k33=cin30*r[3][0]+cin31*r[3][1]+cin32*r[3][2]+cin33*r[3][3];
1588     Double_t k40=cin40*r[0][0]+cin41*r[1][0]+cin42*r[2][0]+cin43*r[3][0];
1589     Double_t k41=cin40*r[1][0]+cin41*r[1][1]+cin42*r[2][1]+cin43*r[3][1];
1590     Double_t k42=cin40*r[2][0]+cin41*r[2][1]+cin42*r[2][2]+cin43*r[3][2];
1591     Double_t k43=cin40*r[3][0]+cin41*r[3][1]+cin42*r[3][2]+cin43*r[3][3];
1592
1593     Double_t x0,x1,x2,x3,x4;
1594     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1595     Double_t savex0=x0, savex1=x1, savex2=x2, savex3=x3;
1596     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1)+k02*(m[2]-savex2)+
1597         k03*(m[3]-savex3);
1598     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1)+k12*(m[2]-savex2)+
1599         k13*(m[3]-savex3);
1600     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1)+k22*(m[2]-savex2)+
1601         k23*(m[3]-savex3);
1602     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1)+k32*(m[2]-savex2)+
1603         k33*(m[3]-savex3);
1604     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1)+k42*(m[2]-savex2)+
1605         k43*(m[3]-savex3);
1606     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1607     c00=cin00-k00*cin00-k01*cin10-k02*cin20-k03*cin30;
1608     c10=cin10-k00*cin10-k01*cin11-k02*cin21-k03*cin31;
1609     c20=cin20-k00*cin20-k01*cin21-k02*cin22-k03*cin32;
1610     c30=cin30-k00*cin30-k01*cin31-k02*cin32-k03*cin33;
1611     c40=cin40-k00*cin40-k01*cin41-k02*cin42-k03*cin43;
1612     c11=cin11-k10*cin10-k11*cin11-k12*cin21-k13*cin31;
1613     c21=cin21-k10*cin20-k11*cin21-k12*cin22-k13*cin32;
1614     c31=cin31-k10*cin30-k11*cin31-k12*cin32-k13*cin33;
1615     c41=cin41-k10*cin40-k11*cin41-k12*cin42-k13*cin43;
1616     c22=cin22-k20*cin20-k21*cin21-k22*cin22-k23*cin32;
1617     c32=cin32-k20*cin30-k21*cin31-k22*cin32-k23*cin33;
1618     c42=cin42-k20*cin40-k21*cin41-k22*cin42-k23*cin43;
1619     c33=cin33-k30*cin30-k31*cin31-k32*cin32-k33*cin33;
1620     c43=cin43-k30*cin40-k31*cin41-k32*cin42-k33*cin43;
1621     c44=cin44-k40*cin40-k41*cin41-k42*cin42-k43*cin43;
1622
1623     newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1624     newTrack->PutCElements(c00,
1625                            c10,c11,
1626                            c20,c21,c22,
1627                            c30,c31,c32,c33,
1628                            c40,c41,c42,c43,c44); // put in track the
1629                                                  // new cov matrix
1630     Double_t vmc[4][4];
1631     vmc[0][0]=v00-c00; vmc[1][0]=-c10; vmc[2][0]=-c20; vmc[3][0]=-c30;
1632     vmc[1][1]=v11-c11; vmc[2][1]=-c21; vmc[3][1]=v31-c31;
1633     vmc[2][2]=v22-c22; vmc[3][2]=v32-c32;
1634     vmc[3][3]=v33-c33;
1635     vmc[0][1]=vmc[1][0]; vmc[0][2]=vmc[2][0]; vmc[0][3]=vmc[3][0];
1636     vmc[1][2]=vmc[2][1]; vmc[1][3]=vmc[3][1];
1637     vmc[2][3]=vmc[3][2];
1638     /////////////////////// vmc matrix inversion ///////////////////////
1639     d=1.;
1640     for(k=0; k<kn; k++) {
1641         ll[k]=k;
1642         mm[k]=k;
1643         big=vmc[k][k];
1644         for(j=k; j<kn ; j++) {
1645             for (i=j; i<kn; i++) {
1646                 if(TMath::Abs(big) < TMath::Abs(vmc[i][j]) ) {
1647                     big=vmc[i][j];
1648                     ll[k]=i;
1649                     mm[k]=j;
1650                 } // end if
1651             } // end for i
1652         } // end for j
1653         //
1654         j= ll[k];
1655         if(j > k) {
1656             for(i=0; i<kn; i++) {
1657                 hold=-vmc[k][i];
1658                 vmc[k][i]=vmc[j][i];
1659                 vmc[j][i]=hold;
1660             } // end for i
1661         } // end if
1662         //
1663         i=mm[k];
1664         if(i > k ) {
1665             for(j=0; j<kn; j++) {
1666                 hold=-vmc[j][k];
1667                 vmc[j][k]=vmc[j][i];
1668                 vmc[j][i]=hold;
1669             } // end for j
1670         } // end if
1671         //
1672         if(!big) {
1673             d=0.;
1674             cout << "Singular matrix\n";
1675         } // end if
1676         for(i=0; i<kn; i++) {
1677             if(i == k) continue;
1678             vmc[i][k]=vmc[i][k]/(-big);
1679         }    // end for i
1680         //
1681         for(i=0; i<kn; i++) {
1682             hold=vmc[i][k];
1683             for(j=0; j<kn; j++) {
1684                 if(i == k || j == k) continue;
1685                 vmc[i][j]=hold*vmc[k][j]+vmc[i][j];
1686             } // end for j
1687         } // end for i
1688         //
1689         for(j=0; j<kn; j++) {
1690             if(j == k) continue;
1691             vmc[k][j]=vmc[k][j]/big;
1692         } // end for j
1693         //
1694         d=d*big;
1695         //
1696         vmc[k][k]=1./big;
1697     }  // end for k
1698     //
1699     for(k=kn-1; k>=0; k--) {
1700         i=ll[k];
1701         if(i > k) {
1702             for (j=0; j<kn; j++) {
1703                 hold=vmc[j][k];
1704                 vmc[j][k]=-vmc[j][i];
1705                 vmc[j][i]=hold;
1706             } // end for j
1707         } // end if i>k
1708         j=mm[k];
1709         if(j > k) {
1710             for (i=0; i<kn; i++) {
1711                 hold=vmc[k][i];
1712                 vmc[k][i]=-vmc[j][i];
1713                 vmc[j][i]=hold;
1714             } // end for i
1715         } // end if j>k
1716     } // end for k
1717     ////////////////////////////////////////////////////////////////////
1718     Double_t chi2=(m[0]-x0)*( vmc[0][0]*(m[0]-x0) + 2.*vmc[1][0]*(m[1]-x1) +
1719                               2.*vmc[2][0]*(m[2]-x2)+ 2.*vmc[3][0]*(m[3]-x3) )+
1720         (m[1]-x1)* ( vmc[1][1]*(m[1]-x1) + 2.*vmc[2][1]*(m[2]-x2)+
1721                      2.*vmc[3][1]*(m[3]-x3) ) +
1722         (m[2]-x2)* ( vmc[2][2]*(m[2]-x2)+ 2.*vmc[3][2]*(m[3]-x3) ) +
1723         (m[3]-x3)*vmc[3][3]*(m[3]-x3);
1724     //cout<<" chi2 kalman = "<<chi2<<"\n";  getchar();
1725     newTrack->SetChi2(newTrack->GetChi2()+chi2);
1726     //   newTrack->SetChi2(newTrack->GetChi2()+chi2pred);
1727 }